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<h1 class="epydoc">Source Code for <a href="octant.sw.misc-module.html">Module octant.sw.misc</a></h1>
<pre class="py-src">
<a name="L1"></a><tt class="py-lineno">  1</tt>  <tt class="py-line"><tt class="py-comment"># --- encoding: iso-8859-1 ---</tt> </tt>
<a name="L2"></a><tt class="py-lineno">  2</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L3"></a><tt class="py-lineno">  3</tt>  <tt class="py-line"><tt class="py-docstring">"""Miscellaneous sea water functions</tt> </tt>
<a name="L4"></a><tt class="py-lineno">  4</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L5"></a><tt class="py-lineno">  5</tt>  <tt class="py-line"><tt class="py-docstring">freezept(S[, P])    -- Freezing point</tt> </tt>
<a name="L6"></a><tt class="py-lineno">  6</tt>  <tt class="py-line"><tt class="py-docstring">soundvel(S, T[, P]) -- Sound velocity</tt> </tt>
<a name="L7"></a><tt class="py-lineno">  7</tt>  <tt class="py-line"><tt class="py-docstring">depth(P, lat)       -- Depth from pressure</tt> </tt>
<a name="L8"></a><tt class="py-lineno">  8</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L9"></a><tt class="py-lineno">  9</tt>  <tt class="py-line"><tt class="py-docstring">Bj&#248;rn &#197;dlandsvik, &lt;bjorn@imr.no&gt;  07 November 2004</tt> </tt>
<a name="L10"></a><tt class="py-lineno"> 10</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L11"></a><tt class="py-lineno"> 11</tt>  <tt class="py-line"><tt class="py-docstring">"""</tt> </tt>
<a name="L12"></a><tt class="py-lineno"> 12</tt>  <tt class="py-line"> </tt>
<a name="L13"></a><tt class="py-lineno"> 13</tt>  <tt class="py-line"><tt class="py-comment"># ----------------------------------------------------------</tt> </tt>
<a name="L14"></a><tt class="py-lineno"> 14</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="freezept"></a><div id="freezept-def"><a name="L15"></a><tt class="py-lineno"> 15</tt> <a class="py-toggle" href="#" id="freezept-toggle" onclick="return toggle('freezept');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.misc-module.html#freezept">freezept</a><tt class="py-op">(</tt><tt class="py-param">S</tt><tt class="py-op">,</tt> <tt class="py-param">P</tt><tt class="py-op">=</tt><tt class="py-number">0</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="freezept-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="freezept-expanded"><a name="L16"></a><tt class="py-lineno"> 16</tt>  <tt class="py-line"> </tt>
<a name="L17"></a><tt class="py-lineno"> 17</tt>  <tt class="py-line">    <tt class="py-docstring">"""Compute freezing temperature of sea water</tt> </tt>
<a name="L18"></a><tt class="py-lineno"> 18</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L19"></a><tt class="py-lineno"> 19</tt>  <tt class="py-line"><tt class="py-docstring">    Usage: freezept(S, [P])</tt> </tt>
<a name="L20"></a><tt class="py-lineno"> 20</tt>  <tt class="py-line"><tt class="py-docstring"> </tt> </tt>
<a name="L21"></a><tt class="py-lineno"> 21</tt>  <tt class="py-line"><tt class="py-docstring">    Input:               </tt> </tt>
<a name="L22"></a><tt class="py-lineno"> 22</tt>  <tt class="py-line"><tt class="py-docstring">        S = Salinity,      [psu]</tt> </tt>
<a name="L23"></a><tt class="py-lineno"> 23</tt>  <tt class="py-line"><tt class="py-docstring">        P = Pressure,      [dbar]</tt> </tt>
<a name="L24"></a><tt class="py-lineno"> 24</tt>  <tt class="py-line"><tt class="py-docstring">    P is optional, with a default value = 0</tt> </tt>
<a name="L25"></a><tt class="py-lineno"> 25</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L26"></a><tt class="py-lineno"> 26</tt>  <tt class="py-line"><tt class="py-docstring">    Output:</tt> </tt>
<a name="L27"></a><tt class="py-lineno"> 27</tt>  <tt class="py-line"><tt class="py-docstring">        T = Freezing point,   [&#176;C]</tt> </tt>
<a name="L28"></a><tt class="py-lineno"> 28</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L29"></a><tt class="py-lineno"> 29</tt>  <tt class="py-line"><tt class="py-docstring">    Algorithm: UNESCO 1983 </tt> </tt>
<a name="L30"></a><tt class="py-lineno"> 30</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L31"></a><tt class="py-lineno"> 31</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
<a name="L32"></a><tt class="py-lineno"> 32</tt>  <tt class="py-line">     </tt>
<a name="L33"></a><tt class="py-lineno"> 33</tt>  <tt class="py-line">    <tt class="py-name">a0</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.0575</tt> </tt>
<a name="L34"></a><tt class="py-lineno"> 34</tt>  <tt class="py-line">    <tt class="py-name">a1</tt> <tt class="py-op">=</tt>  <tt class="py-number">1.710523e-3</tt> </tt>
<a name="L35"></a><tt class="py-lineno"> 35</tt>  <tt class="py-line">    <tt class="py-name">a2</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">2.154996e-4</tt> </tt>
<a name="L36"></a><tt class="py-lineno"> 36</tt>  <tt class="py-line">    <tt class="py-name">b</tt>  <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">7.53e-4</tt> </tt>
<a name="L37"></a><tt class="py-lineno"> 37</tt>  <tt class="py-line"> </tt>
<a name="L38"></a><tt class="py-lineno"> 38</tt>  <tt class="py-line">    <tt class="py-name">Tf</tt> <tt class="py-op">=</tt> <tt class="py-name">a0</tt><tt class="py-op">*</tt><tt class="py-name">S</tt> <tt class="py-op">+</tt> <tt class="py-name">a1</tt><tt class="py-op">*</tt><tt class="py-name">S</tt><tt class="py-op">**</tt><tt class="py-number">1.5</tt> <tt class="py-op">+</tt> <tt class="py-name">a2</tt><tt class="py-op">*</tt><tt class="py-name">S</tt><tt class="py-op">**</tt><tt class="py-number">2</tt> <tt class="py-op">+</tt> <tt class="py-name">b</tt><tt class="py-op">*</tt><tt class="py-name">P</tt> </tt>
<a name="L39"></a><tt class="py-lineno"> 39</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">Tf</tt> </tt>
</div><a name="L40"></a><tt class="py-lineno"> 40</tt>  <tt class="py-line"> </tt>
<a name="L41"></a><tt class="py-lineno"> 41</tt>  <tt class="py-line"><tt class="py-comment"># ----------------------------------------------------------------</tt> </tt>
<a name="L42"></a><tt class="py-lineno"> 42</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="soundvel"></a><div id="soundvel-def"><a name="L43"></a><tt class="py-lineno"> 43</tt> <a class="py-toggle" href="#" id="soundvel-toggle" onclick="return toggle('soundvel');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.misc-module.html#soundvel">soundvel</a><tt class="py-op">(</tt><tt class="py-param">S</tt><tt class="py-op">,</tt> <tt class="py-param">T</tt><tt class="py-op">,</tt> <tt class="py-param">P</tt><tt class="py-op">=</tt><tt class="py-number">0</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="soundvel-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="soundvel-expanded"><a name="L44"></a><tt class="py-lineno"> 44</tt>  <tt class="py-line">    <tt class="py-docstring">"""Compute velocity of sound</tt> </tt>
<a name="L45"></a><tt class="py-lineno"> 45</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L46"></a><tt class="py-lineno"> 46</tt>  <tt class="py-line"><tt class="py-docstring">    Usage: soundvel(S, T, [P])</tt> </tt>
<a name="L47"></a><tt class="py-lineno"> 47</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L48"></a><tt class="py-lineno"> 48</tt>  <tt class="py-line"><tt class="py-docstring">    Input:</tt> </tt>
<a name="L49"></a><tt class="py-lineno"> 49</tt>  <tt class="py-line"><tt class="py-docstring">        S = Salinity,     [PSS-78]</tt> </tt>
<a name="L50"></a><tt class="py-lineno"> 50</tt>  <tt class="py-line"><tt class="py-docstring">        T = Temperature,  [&#176;C]</tt> </tt>
<a name="L51"></a><tt class="py-lineno"> 51</tt>  <tt class="py-line"><tt class="py-docstring">        P = Pressure,     [dbar]</tt> </tt>
<a name="L52"></a><tt class="py-lineno"> 52</tt>  <tt class="py-line"><tt class="py-docstring">    P is optional, with a default value = zero</tt> </tt>
<a name="L53"></a><tt class="py-lineno"> 53</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L54"></a><tt class="py-lineno"> 54</tt>  <tt class="py-line"><tt class="py-docstring">    Output:</tt> </tt>
<a name="L55"></a><tt class="py-lineno"> 55</tt>  <tt class="py-line"><tt class="py-docstring">        Sound velocity,  [m/s]</tt> </tt>
<a name="L56"></a><tt class="py-lineno"> 56</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L57"></a><tt class="py-lineno"> 57</tt>  <tt class="py-line"><tt class="py-docstring">    Algorithm: UNESCO 1983 </tt> </tt>
<a name="L58"></a><tt class="py-lineno"> 58</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L59"></a><tt class="py-lineno"> 59</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
<a name="L60"></a><tt class="py-lineno"> 60</tt>  <tt class="py-line"> </tt>
<a name="L61"></a><tt class="py-lineno"> 61</tt>  <tt class="py-line">    <tt class="py-name">P</tt> <tt class="py-op">=</tt> <tt class="py-number">0.1</tt><tt class="py-op">*</tt><tt class="py-name">P</tt>  <tt class="py-comment"># Conversion to bar</tt> </tt>
<a name="L62"></a><tt class="py-lineno"> 62</tt>  <tt class="py-line"> </tt>
<a name="L63"></a><tt class="py-lineno"> 63</tt>  <tt class="py-line">    <tt class="py-name">c00</tt> <tt class="py-op">=</tt> <tt class="py-number">1402.388</tt> </tt>
<a name="L64"></a><tt class="py-lineno"> 64</tt>  <tt class="py-line">    <tt class="py-name">c01</tt> <tt class="py-op">=</tt>  <tt class="py-number">5.03711</tt> </tt>
<a name="L65"></a><tt class="py-lineno"> 65</tt>  <tt class="py-line">    <tt class="py-name">c02</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">5.80852e-2</tt> </tt>
<a name="L66"></a><tt class="py-lineno"> 66</tt>  <tt class="py-line">    <tt class="py-name">c03</tt> <tt class="py-op">=</tt>  <tt class="py-number">3.3420e-4</tt> </tt>
<a name="L67"></a><tt class="py-lineno"> 67</tt>  <tt class="py-line">    <tt class="py-name">c04</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1.47800e-6</tt> </tt>
<a name="L68"></a><tt class="py-lineno"> 68</tt>  <tt class="py-line">    <tt class="py-name">c05</tt> <tt class="py-op">=</tt>  <tt class="py-number">3.1464e-9</tt> </tt>
<a name="L69"></a><tt class="py-lineno"> 69</tt>  <tt class="py-line"> </tt>
<a name="L70"></a><tt class="py-lineno"> 70</tt>  <tt class="py-line">    <tt class="py-name">c10</tt> <tt class="py-op">=</tt>  <tt class="py-number">0.153563</tt> </tt>
<a name="L71"></a><tt class="py-lineno"> 71</tt>  <tt class="py-line">    <tt class="py-name">c11</tt> <tt class="py-op">=</tt>  <tt class="py-number">6.8982e-4</tt> </tt>
<a name="L72"></a><tt class="py-lineno"> 72</tt>  <tt class="py-line">    <tt class="py-name">c12</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">8.1788e-6</tt> </tt>
<a name="L73"></a><tt class="py-lineno"> 73</tt>  <tt class="py-line">    <tt class="py-name">c13</tt> <tt class="py-op">=</tt>  <tt class="py-number">1.3621e-7</tt> </tt>
<a name="L74"></a><tt class="py-lineno"> 74</tt>  <tt class="py-line">    <tt class="py-name">c14</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">6.1185e-10</tt> </tt>
<a name="L75"></a><tt class="py-lineno"> 75</tt>  <tt class="py-line"> </tt>
<a name="L76"></a><tt class="py-lineno"> 76</tt>  <tt class="py-line">    <tt class="py-name">c20</tt> <tt class="py-op">=</tt>  <tt class="py-number">3.1260e-5</tt> </tt>
<a name="L77"></a><tt class="py-lineno"> 77</tt>  <tt class="py-line">    <tt class="py-name">c21</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1.7107e-6</tt> </tt>
<a name="L78"></a><tt class="py-lineno"> 78</tt>  <tt class="py-line">    <tt class="py-name">c22</tt> <tt class="py-op">=</tt>  <tt class="py-number">2.5974e-8</tt> </tt>
<a name="L79"></a><tt class="py-lineno"> 79</tt>  <tt class="py-line">    <tt class="py-name">c23</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">2.5335e-10</tt> </tt>
<a name="L80"></a><tt class="py-lineno"> 80</tt>  <tt class="py-line">    <tt class="py-name">c24</tt> <tt class="py-op">=</tt>  <tt class="py-number">1.0405e-12</tt> </tt>
<a name="L81"></a><tt class="py-lineno"> 81</tt>  <tt class="py-line"> </tt>
<a name="L82"></a><tt class="py-lineno"> 82</tt>  <tt class="py-line">    <tt class="py-name">c30</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">9.7729e-9</tt> </tt>
<a name="L83"></a><tt class="py-lineno"> 83</tt>  <tt class="py-line">    <tt class="py-name">c31</tt> <tt class="py-op">=</tt>  <tt class="py-number">3.8504e-10</tt> </tt>
<a name="L84"></a><tt class="py-lineno"> 84</tt>  <tt class="py-line">    <tt class="py-name">c32</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">2.3643e-12</tt> </tt>
<a name="L85"></a><tt class="py-lineno"> 85</tt>  <tt class="py-line">  </tt>
<a name="L86"></a><tt class="py-lineno"> 86</tt>  <tt class="py-line">    <tt class="py-name">P2</tt> <tt class="py-op">=</tt> <tt class="py-name">P</tt><tt class="py-op">*</tt><tt class="py-name">P</tt> </tt>
<a name="L87"></a><tt class="py-lineno"> 87</tt>  <tt class="py-line">    <tt class="py-name">P3</tt> <tt class="py-op">=</tt> <tt class="py-name">P2</tt><tt class="py-op">*</tt><tt class="py-name">P</tt> </tt>
<a name="L88"></a><tt class="py-lineno"> 88</tt>  <tt class="py-line">    <tt class="py-name">Cw</tt> <tt class="py-op">=</tt>  <tt class="py-name">c00</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c01</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c02</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c03</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c04</tt> <tt class="py-op">+</tt> <tt class="py-name">c05</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt>   \ </tt>
<a name="L89"></a><tt class="py-lineno"> 89</tt>  <tt class="py-line">       <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c10</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c11</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c12</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c13</tt> <tt class="py-op">+</tt> <tt class="py-name">c14</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P</tt>          \ </tt>
<a name="L90"></a><tt class="py-lineno"> 90</tt>  <tt class="py-line">       <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c20</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c21</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c22</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c23</tt> <tt class="py-op">+</tt> <tt class="py-name">c24</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P2</tt>         \ </tt>
<a name="L91"></a><tt class="py-lineno"> 91</tt>  <tt class="py-line">       <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c30</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c31</tt> <tt class="py-op">+</tt> <tt class="py-name">c32</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P3</tt> </tt>
<a name="L92"></a><tt class="py-lineno"> 92</tt>  <tt class="py-line">  </tt>
<a name="L93"></a><tt class="py-lineno"> 93</tt>  <tt class="py-line">    <tt class="py-name">a00</tt> <tt class="py-op">=</tt>  <tt class="py-number">1.389</tt> </tt>
<a name="L94"></a><tt class="py-lineno"> 94</tt>  <tt class="py-line">    <tt class="py-name">a01</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1.262e-2</tt> </tt>
<a name="L95"></a><tt class="py-lineno"> 95</tt>  <tt class="py-line">    <tt class="py-name">a02</tt> <tt class="py-op">=</tt>  <tt class="py-number">7.164e-5</tt> </tt>
<a name="L96"></a><tt class="py-lineno"> 96</tt>  <tt class="py-line">    <tt class="py-name">a03</tt> <tt class="py-op">=</tt>  <tt class="py-number">2.006e-6</tt> </tt>
<a name="L97"></a><tt class="py-lineno"> 97</tt>  <tt class="py-line">    <tt class="py-name">a04</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">3.21e-8</tt> </tt>
<a name="L98"></a><tt class="py-lineno"> 98</tt>  <tt class="py-line"> </tt>
<a name="L99"></a><tt class="py-lineno"> 99</tt>  <tt class="py-line">    <tt class="py-name">a10</tt> <tt class="py-op">=</tt>  <tt class="py-number">9.4742e-5</tt> </tt>
<a name="L100"></a><tt class="py-lineno">100</tt>  <tt class="py-line">    <tt class="py-name">a11</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1.2580e-5</tt> </tt>
<a name="L101"></a><tt class="py-lineno">101</tt>  <tt class="py-line">    <tt class="py-name">a12</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">6.4885e-8</tt> </tt>
<a name="L102"></a><tt class="py-lineno">102</tt>  <tt class="py-line">    <tt class="py-name">a13</tt> <tt class="py-op">=</tt>  <tt class="py-number">1.0507e-8</tt> </tt>
<a name="L103"></a><tt class="py-lineno">103</tt>  <tt class="py-line">    <tt class="py-name">a14</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">2.0122e-10</tt> </tt>
<a name="L104"></a><tt class="py-lineno">104</tt>  <tt class="py-line"> </tt>
<a name="L105"></a><tt class="py-lineno">105</tt>  <tt class="py-line">    <tt class="py-name">a20</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">3.9064e-7</tt> </tt>
<a name="L106"></a><tt class="py-lineno">106</tt>  <tt class="py-line">    <tt class="py-name">a21</tt> <tt class="py-op">=</tt>  <tt class="py-number">9.1041e-9</tt> </tt>
<a name="L107"></a><tt class="py-lineno">107</tt>  <tt class="py-line">    <tt class="py-name">a22</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1.6002e-10</tt> </tt>
<a name="L108"></a><tt class="py-lineno">108</tt>  <tt class="py-line">    <tt class="py-name">a23</tt> <tt class="py-op">=</tt>  <tt class="py-number">7.988e-12</tt> </tt>
<a name="L109"></a><tt class="py-lineno">109</tt>  <tt class="py-line"> </tt>
<a name="L110"></a><tt class="py-lineno">110</tt>  <tt class="py-line">    <tt class="py-name">a30</tt> <tt class="py-op">=</tt>  <tt class="py-number">1.100e-10</tt> </tt>
<a name="L111"></a><tt class="py-lineno">111</tt>  <tt class="py-line">    <tt class="py-name">a31</tt> <tt class="py-op">=</tt>  <tt class="py-number">6.649e-12</tt> </tt>
<a name="L112"></a><tt class="py-lineno">112</tt>  <tt class="py-line">    <tt class="py-name">a32</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">3.389e-13</tt> </tt>
<a name="L113"></a><tt class="py-lineno">113</tt>  <tt class="py-line"> </tt>
<a name="L114"></a><tt class="py-lineno">114</tt>  <tt class="py-line">    <tt class="py-name">A</tt> <tt class="py-op">=</tt>  <tt class="py-name">a00</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a01</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a02</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a03</tt> <tt class="py-op">+</tt> <tt class="py-name">a04</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt>      \ </tt>
<a name="L115"></a><tt class="py-lineno">115</tt>  <tt class="py-line">      <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a10</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a11</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a12</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a13</tt> <tt class="py-op">+</tt> <tt class="py-name">a14</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P</tt>   \ </tt>
<a name="L116"></a><tt class="py-lineno">116</tt>  <tt class="py-line">      <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a20</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a21</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a22</tt> <tt class="py-op">+</tt> <tt class="py-name">a23</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P2</tt>            \ </tt>
<a name="L117"></a><tt class="py-lineno">117</tt>  <tt class="py-line">      <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a30</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a31</tt> <tt class="py-op">+</tt> <tt class="py-name">a32</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P3</tt> </tt>
<a name="L118"></a><tt class="py-lineno">118</tt>  <tt class="py-line"> </tt>
<a name="L119"></a><tt class="py-lineno">119</tt>  <tt class="py-line">    <tt class="py-name">b00</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1.922e-2</tt> </tt>
<a name="L120"></a><tt class="py-lineno">120</tt>  <tt class="py-line">    <tt class="py-name">b01</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">4.42e-5</tt> </tt>
<a name="L121"></a><tt class="py-lineno">121</tt>  <tt class="py-line">    <tt class="py-name">b10</tt> <tt class="py-op">=</tt>  <tt class="py-number">7.3637e-5</tt> </tt>
<a name="L122"></a><tt class="py-lineno">122</tt>  <tt class="py-line">    <tt class="py-name">b11</tt> <tt class="py-op">=</tt>  <tt class="py-number">1.7945e-7</tt> </tt>
<a name="L123"></a><tt class="py-lineno">123</tt>  <tt class="py-line"> </tt>
<a name="L124"></a><tt class="py-lineno">124</tt>  <tt class="py-line">    <tt class="py-name">B</tt> <tt class="py-op">=</tt> <tt class="py-name">b00</tt> <tt class="py-op">+</tt> <tt class="py-name">b01</tt><tt class="py-op">*</tt><tt class="py-name">T</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">b10</tt> <tt class="py-op">+</tt> <tt class="py-name">b11</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P</tt> </tt>
<a name="L125"></a><tt class="py-lineno">125</tt>  <tt class="py-line"> </tt>
<a name="L126"></a><tt class="py-lineno">126</tt>  <tt class="py-line">    <tt class="py-name">d00</tt> <tt class="py-op">=</tt>  <tt class="py-number">1.727e-3</tt> </tt>
<a name="L127"></a><tt class="py-lineno">127</tt>  <tt class="py-line">    <tt class="py-name">d10</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">7.9836e-6</tt> </tt>
<a name="L128"></a><tt class="py-lineno">128</tt>  <tt class="py-line"> </tt>
<a name="L129"></a><tt class="py-lineno">129</tt>  <tt class="py-line">    <tt class="py-name">D</tt> <tt class="py-op">=</tt> <tt class="py-name">d00</tt> <tt class="py-op">+</tt> <tt class="py-name">d10</tt><tt class="py-op">*</tt><tt class="py-name">P</tt> </tt>
<a name="L130"></a><tt class="py-lineno">130</tt>  <tt class="py-line"> </tt>
<a name="L131"></a><tt class="py-lineno">131</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">Cw</tt> <tt class="py-op">+</tt> <tt class="py-name">A</tt><tt class="py-op">*</tt><tt class="py-name">S</tt> <tt class="py-op">+</tt> <tt class="py-name">B</tt><tt class="py-op">*</tt><tt class="py-name">S</tt><tt class="py-op">**</tt><tt class="py-number">1.5</tt> <tt class="py-op">+</tt> <tt class="py-name">D</tt><tt class="py-op">*</tt><tt class="py-name">S</tt><tt class="py-op">**</tt><tt class="py-number">2</tt> </tt>
</div><a name="L132"></a><tt class="py-lineno">132</tt>  <tt class="py-line"> </tt>
<a name="L133"></a><tt class="py-lineno">133</tt>  <tt class="py-line"><tt class="py-comment"># ----------------------------------------------------------------</tt> </tt>
<a name="L134"></a><tt class="py-lineno">134</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="depth"></a><div id="depth-def"><a name="L135"></a><tt class="py-lineno">135</tt> <a class="py-toggle" href="#" id="depth-toggle" onclick="return toggle('depth');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.misc-module.html#depth">depth</a><tt class="py-op">(</tt><tt class="py-param">P</tt><tt class="py-op">,</tt> <tt class="py-param">lat</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="depth-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="depth-expanded"><a name="L136"></a><tt class="py-lineno">136</tt>  <tt class="py-line">    <tt class="py-docstring">"""Compute depth from pressure and latitude</tt> </tt>
<a name="L137"></a><tt class="py-lineno">137</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L138"></a><tt class="py-lineno">138</tt>  <tt class="py-line"><tt class="py-docstring">    Usage: depth(P, lat)</tt> </tt>
<a name="L139"></a><tt class="py-lineno">139</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L140"></a><tt class="py-lineno">140</tt>  <tt class="py-line"><tt class="py-docstring">    Input:</tt> </tt>
<a name="L141"></a><tt class="py-lineno">141</tt>  <tt class="py-line"><tt class="py-docstring">        P = Pressure,     [dbar]</tt> </tt>
<a name="L142"></a><tt class="py-lineno">142</tt>  <tt class="py-line"><tt class="py-docstring">        lat = Latitude    [deg]</tt> </tt>
<a name="L143"></a><tt class="py-lineno">143</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L144"></a><tt class="py-lineno">144</tt>  <tt class="py-line"><tt class="py-docstring">    Output:</tt> </tt>
<a name="L145"></a><tt class="py-lineno">145</tt>  <tt class="py-line"><tt class="py-docstring">        Depth             [m]</tt> </tt>
<a name="L146"></a><tt class="py-lineno">146</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L147"></a><tt class="py-lineno">147</tt>  <tt class="py-line"><tt class="py-docstring">    Algorithm: UNESCO 1983 </tt> </tt>
<a name="L148"></a><tt class="py-lineno">148</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L149"></a><tt class="py-lineno">149</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
<a name="L150"></a><tt class="py-lineno">150</tt>  <tt class="py-line">     </tt>
<a name="L151"></a><tt class="py-lineno">151</tt>  <tt class="py-line">    <tt class="py-comment"># Use Numeric for trigonometry if present</tt> </tt>
<a name="L152"></a><tt class="py-lineno">152</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-keyword">try</tt><tt class="py-op">:</tt> </tt>
<a name="L153"></a><tt class="py-lineno">153</tt>  <tt class="py-line">        <tt class="py-keyword">from</tt> <tt class="py-name">Numeric</tt> <tt class="py-keyword">import</tt> <tt id="link-0" class="py-name" targets="Variable octant.ocean.depths.sin=octant.ocean.depths-module.html#sin,Variable octant.ocean.sin=octant.ocean-module.html#sin,Variable octant.ocean.state.sin=octant.ocean.state-module.html#sin,Variable octant.ocean.step3d_t.sin=octant.ocean.step3d_t-module.html#sin,Variable octant.ocean.time.sin=octant.ocean.time-module.html#sin,Variable octant.ocean.velocity.sin=octant.ocean.velocity-module.html#sin"><a title="octant.ocean.depths.sin
octant.ocean.sin
octant.ocean.state.sin
octant.ocean.step3d_t.sin
octant.ocean.time.sin
octant.ocean.velocity.sin" class="py-name" href="#" onclick="return doclink('link-0', 'sin', 'link-0');">sin</a></tt><tt class="py-op">,</tt> <tt id="link-1" class="py-name" targets="Variable octant.ocean.depths.pi=octant.ocean.depths-module.html#pi,Variable octant.ocean.pi=octant.ocean-module.html#pi,Variable octant.ocean.state.pi=octant.ocean.state-module.html#pi,Variable octant.ocean.step3d_t.pi=octant.ocean.step3d_t-module.html#pi,Variable octant.ocean.time.pi=octant.ocean.time-module.html#pi,Variable octant.ocean.velocity.pi=octant.ocean.velocity-module.html#pi"><a title="octant.ocean.depths.pi
octant.ocean.pi
octant.ocean.state.pi
octant.ocean.step3d_t.pi
octant.ocean.time.pi
octant.ocean.velocity.pi" class="py-name" href="#" onclick="return doclink('link-1', 'pi', 'link-1');">pi</a></tt> </tt>
<a name="L154"></a><tt class="py-lineno">154</tt>  <tt class="py-line">    <tt class="py-keyword">except</tt><tt class="py-op">:</tt> </tt>
<a name="L155"></a><tt class="py-lineno">155</tt>  <tt class="py-line">        <tt class="py-keyword">from</tt> <tt class="py-name">math</tt> <tt class="py-keyword">import</tt> <tt id="link-2" class="py-name"><a title="octant.ocean.depths.sin
octant.ocean.sin
octant.ocean.state.sin
octant.ocean.step3d_t.sin
octant.ocean.time.sin
octant.ocean.velocity.sin" class="py-name" href="#" onclick="return doclink('link-2', 'sin', 'link-0');">sin</a></tt><tt class="py-op">,</tt> <tt id="link-3" class="py-name"><a title="octant.ocean.depths.pi
octant.ocean.pi
octant.ocean.state.pi
octant.ocean.step3d_t.pi
octant.ocean.time.pi
octant.ocean.velocity.pi" class="py-name" href="#" onclick="return doclink('link-3', 'pi', 'link-1');">pi</a></tt> </tt>
<a name="L156"></a><tt class="py-lineno">156</tt>  <tt class="py-line">     </tt>
<a name="L157"></a><tt class="py-lineno">157</tt>  <tt class="py-line">    <tt class="py-name">a1</tt> <tt class="py-op">=</tt>  <tt class="py-number">9.72659</tt> </tt>
<a name="L158"></a><tt class="py-lineno">158</tt>  <tt class="py-line">    <tt class="py-name">a2</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">2.2512e-5</tt> </tt>
<a name="L159"></a><tt class="py-lineno">159</tt>  <tt class="py-line">    <tt class="py-name">a3</tt> <tt class="py-op">=</tt>  <tt class="py-number">2.279e-10</tt> </tt>
<a name="L160"></a><tt class="py-lineno">160</tt>  <tt class="py-line">    <tt class="py-name">a4</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1.82e-15</tt> </tt>
<a name="L161"></a><tt class="py-lineno">161</tt>  <tt class="py-line"> </tt>
<a name="L162"></a><tt class="py-lineno">162</tt>  <tt class="py-line">    <tt class="py-name">b</tt>  <tt class="py-op">=</tt>  <tt class="py-number">1.092e-6</tt> </tt>
<a name="L163"></a><tt class="py-lineno">163</tt>  <tt class="py-line"> </tt>
<a name="L164"></a><tt class="py-lineno">164</tt>  <tt class="py-line">    <tt class="py-name">g0</tt> <tt class="py-op">=</tt>  <tt class="py-number">9.780318</tt> </tt>
<a name="L165"></a><tt class="py-lineno">165</tt>  <tt class="py-line">    <tt class="py-name">g1</tt> <tt class="py-op">=</tt>  <tt class="py-number">5.2788e-3</tt> </tt>
<a name="L166"></a><tt class="py-lineno">166</tt>  <tt class="py-line">    <tt class="py-name">g2</tt> <tt class="py-op">=</tt>  <tt class="py-number">2.36e-5</tt> </tt>
<a name="L167"></a><tt class="py-lineno">167</tt>  <tt class="py-line"> </tt>
<a name="L168"></a><tt class="py-lineno">168</tt>  <tt class="py-line">    <tt class="py-name">rad</tt> <tt class="py-op">=</tt> <tt id="link-4" class="py-name"><a title="octant.ocean.depths.pi
octant.ocean.pi
octant.ocean.state.pi
octant.ocean.step3d_t.pi
octant.ocean.time.pi
octant.ocean.velocity.pi" class="py-name" href="#" onclick="return doclink('link-4', 'pi', 'link-1');">pi</a></tt> <tt class="py-op">/</tt> <tt class="py-number">180.</tt> </tt>
<a name="L169"></a><tt class="py-lineno">169</tt>  <tt class="py-line"> </tt>
<a name="L170"></a><tt class="py-lineno">170</tt>  <tt class="py-line">    <tt class="py-name">X</tt> <tt class="py-op">=</tt> <tt id="link-5" class="py-name"><a title="octant.ocean.depths.sin
octant.ocean.sin
octant.ocean.state.sin
octant.ocean.step3d_t.sin
octant.ocean.time.sin
octant.ocean.velocity.sin" class="py-name" href="#" onclick="return doclink('link-5', 'sin', 'link-0');">sin</a></tt><tt class="py-op">(</tt><tt id="link-6" class="py-name" targets="Variable octant.grid.CGrid_geo.lat=octant.grid.CGrid_geo-class.html#lat"><a title="octant.grid.CGrid_geo.lat" class="py-name" href="#" onclick="return doclink('link-6', 'lat', 'link-6');">lat</a></tt><tt class="py-op">*</tt><tt class="py-name">rad</tt><tt class="py-op">)</tt> </tt>
<a name="L171"></a><tt class="py-lineno">171</tt>  <tt class="py-line">    <tt class="py-name">X</tt> <tt class="py-op">=</tt> <tt class="py-name">X</tt><tt class="py-op">*</tt><tt class="py-name">X</tt> </tt>
<a name="L172"></a><tt class="py-lineno">172</tt>  <tt class="py-line">    <tt class="py-name">grav</tt> <tt class="py-op">=</tt> <tt class="py-name">g0</tt> <tt class="py-op">*</tt> <tt class="py-op">(</tt><tt class="py-number">1.0</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">g1</tt> <tt class="py-op">+</tt> <tt class="py-name">g2</tt><tt class="py-op">*</tt><tt class="py-name">X</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">X</tt><tt class="py-op">)</tt> <tt class="py-op">+</tt> <tt class="py-name">b</tt><tt class="py-op">*</tt><tt class="py-name">P</tt> </tt>
<a name="L173"></a><tt class="py-lineno">173</tt>  <tt class="py-line">    <tt class="py-name">nom</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">a1</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a2</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a3</tt> <tt class="py-op">+</tt> <tt class="py-name">a4</tt><tt class="py-op">*</tt><tt class="py-name">P</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P</tt> </tt>
<a name="L174"></a><tt class="py-lineno">174</tt>  <tt class="py-line"> </tt>
<a name="L175"></a><tt class="py-lineno">175</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">nom</tt> <tt class="py-op">/</tt> <tt class="py-name">grav</tt> </tt>
</div><a name="L176"></a><tt class="py-lineno">176</tt>  <tt class="py-line"> </tt><script type="text/javascript">
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